Recently Google rolled out its new plus one (+1) button globally. You must have seen +1 button appearing on Google page results as well as in new articles/websites you visit. It is a social sharing button where you can recommend a website or an article to your friends.
+1 button will be shown only for signed in users of Google.com. When you +1 a web page, it will be recommended to those in your Gmail contact list. Google will find web pages +1’d by your friends as more relevant to your search queries.
You can also +1 a web page link appearing in the Google page result itself. You will find it next to the titles (links to the web pages) on the Google search results.
Google +1 button will have a big impact on its search results. Regarding Search Engine Optimization (SEO) perspective, Google is more likely to tweak it’s algorithm to effect the +1 changes. Google will find content recommended by a persons’ friend as more relevant to their search query, and will show them up in the search results.
Google has also released a +1 metric on its webmaster tool where you can find out the search impact it is making on your website. So you can see how the +1 button affects the traffic of your website. You can also determine the geography and demographic information about the users who +1’d your web page.
You can add the Google+ Share button right now to your articles or website and let people who love your content recommend it on Google search. Just go here (http://www.google.com/webmasters/+1/button/) to generate a button style for your site.